Intelligent reinforcing support for reinforced concrete low-box girders and method for minimally invasive reinforcement

Abstract

An intelligent reinforcing support for reinforced concrete low-box girder and method for minimally invasive reinforcement, including first main body, second main body, one-way rotation support structure, one-way lifting structure and control device; first and second main bodies arranged up and down, first main body used to transfer load on bridge deck to second main body, second main body used to transfer load to bottom plate, lower part of first main body inserted into second main body and matched with second main body through one-way lifting structure; outer wall of upper part of first main body and outer wall of second main body respectively provided with one-way rotation support structure and automatic lock, automatic lock connected to lock catch of corresponding one-way rotation support structure, communicated with control device, automatic lock unlocks after receiving instruction, supporting rod of first main body moves upwards, supporting rod of second main body moves downwards.

What is claimed is: 
     
         1 . An intelligent reinforcing support for a reinforced concrete low-box girder, comprising a first main body, a second main body, a one-way rotation support structure, a one-way lifting structure and a control device; the first main body and the second main body are arranged up and down, wherein the first main body is used to transfer a load on bridge deck to the second main body, and the second main body is used to transfer the load to a bottom plate, a lower part of the first main body is inserted into the second main body and is matched with the second main body through the one-way lifting structure; an outer wall of an upper part of the first main body and an outer wall of the second main body are respectively provided with the one-way rotation support structure and an automatic lock which are matched with each other, the automatic lock is connected to a lock catch of the corresponding one-way rotation support structure, and is communicated with the control device, and the automatic lock is unlocked from the lock catch after receiving the instruction, a supporting rod of the first main body moves upwards, and a supporting rod of the second main body moves downwards. 
     
     
         2 . The intelligent reinforcing support for a reinforced concrete low-box girder according to  claim 1 , wherein the one-way rotation support structure comprises a connecting shaft, a ratchet, a pawl, a torsion spring, and the supporting rod; a first end and a second end of the connecting shaft are horizontally mounted in supporting bases on the first main body or the second main body, respectively; the ratchet is mounted on the connecting shaft through the torsion spring, and is connected with the supporting rod; the pawls mounted on the first main body or the second main body are arranged above and below the ratchet, respectively, and are connected to the first main body or the second main body through a compression spring; the pawls fit with the ratchet. 
     
     
         3 . The intelligent reinforcing support for a reinforced concrete low-box girder according to  claim 2 , wherein the first end and the second end of the connecting shaft are connected to the supporting bases by means of threads. 
     
     
         4 . The intelligent reinforcing support for a reinforced concrete low-box girder according to  claim 2 , wherein the torsion spring is provided on a first side of the ratchet, and a first end of the torsion spring is welded to a first sleeve fixed to an outer wall of the connecting shaft, a second end of the torsion spring is stuck in a slot opened in a second sleeve welded to the ratchet. 
     
     
         5 . The intelligent reinforcing support for a reinforced concrete low-box girder according to  claim 4 , wherein an angle sensor is provided on a second side of the ratchet, a battery and a data uploading device are fixed on the angle sensor, and an out part of the angle sensor is fixed on the supporting base, and the angle sensor is connected to a third sleeve welded to the ratchet using a key. 
     
     
         6 . The intelligent reinforcing support for a reinforced concrete low-box girder according to  claim 2 , wherein the supporting rod and the ratchet are a whole, the end of the supporting rod is a hemispherical surface, and the hemispherical surface is covered with a rubber pad; the lock catch is welded on a side of the supporting rod, and the lock catch is connected with the automatic lock. 
     
     
         7 . The intelligent reinforcing support for a reinforced concrete low-box girder according to  claim 1 , wherein a top surface of the first main body is welded with a lifting ring. 
     
     
         8 . The intelligent reinforcing support for a reinforced concrete low-box girder according to  claim 1 , wherein the one-way lifting structure comprises one-way lifting teeth provided on the surface of the lower part of the first main body, a chute provided on an upper part of the second main body, a non-return shaft matched with the one-way lifting teeth is provided in the chute, and a limit lock is provided in an upper part of the chute and is inserted into the chute. 
     
     
         9 . The intelligent reinforcing support for a reinforced concrete low- box girder according to  claim 1 , wherein a displacement sensor is provided between the first main body and the second main body. 
     
     
         10 . A method for minimally invasive reinforcement of a reinforced concrete low-box girder by using an intelligent reinforcing support of  claim 1 , comprising the steps of:
 step 1: building a local area network (LAN) in a section required reinforcement construction, and connecting a handheld terminal and an intelligent reinforcing support into the LAN;   step 2: calculating a distance from a lower end of the intelligent reinforcing support to a bottom plate of a box girder before a supporting rod at a lower part of the intelligent reinforcing support is extended;   step 3: checking whether a lock catch on the supporting rod and an automatic lock work normally, and checking whether a limit lock works normally;   step 4: opening a construction hole on a bridge deck, a diameter of the construction hole is slightly larger than a diameter of the intelligent reinforcing support;   step 5: erecting a triangle hanger around the construction hole, and lifting slowly the intelligent reinforcing support vertically into a chamber of the box girder by using the triangle hanger, so that the distance calculated in step  2  is reserved between the lowermost end of the intelligent reinforcing support and the bottom plate, and then sending an instruction by the handheld terminal to unlock the automatic lock on a second main body of the intelligent reinforcing support, so that the supporting rod at the lower part starts to rotate in one direction until the supporting rod is propped against the bottom plate and then the rotation is stopped; an angle sensor mounted on a ratchet uploads rotation angle data to monitor whether the rotation is completed; after the rotation is completed, continuing to lift the intelligent reinforcing support into the chamber, a pawl accurately locks the ratchet by the gravity of the supporting rod at the lower part of the intelligent reinforcing support; at this time the intelligent reinforcing support stands stable on the bottom plate;   step 6: sending a wireless instruction by the handheld terminal to unlock the automatic lock on the first main body, the supporting rod at an upper part of the intelligent reinforcing support rotates in one direction, monitoring whether the rotation is completed by using the rotation angle data uploaded by the angle sensor; at this time, the supporting rod is in full contact with a top plate of the box girder;   step 7: lifting the first main body, a rubber pad at the end of the supporting rod at the upper part is deformed due to the lift of the first main body, controlling the pawl to accurately lock the one-way teeth of the ratchet by utilizing the compression of the rubber pad; and   step 8: arranging the intelligent reinforcing supports in the section required reinforcement construction of the bridge in a quincuncial piles type layout.